Blame view
fs/proc/task_nommu.c
7.35 KB
1da177e4c
|
1 2 3 |
#include <linux/mm.h> #include <linux/file.h> |
eb28062f1
|
4 |
#include <linux/fdtable.h> |
5ad4e53bd
|
5 |
#include <linux/fs_struct.h> |
1da177e4c
|
6 |
#include <linux/mount.h> |
5096add84
|
7 |
#include <linux/ptrace.h> |
5a0e3ad6a
|
8 |
#include <linux/slab.h> |
1da177e4c
|
9 10 11 12 13 |
#include <linux/seq_file.h> #include "internal.h" /* * Logic: we've got two memory sums for each process, "shared", and |
025dfdafe
|
14 |
* "non-shared". Shared memory may get counted more than once, for |
1da177e4c
|
15 16 17 |
* each process that owns it. Non-shared memory is counted * accurately. */ |
df5f8314c
|
18 |
void task_mem(struct seq_file *m, struct mm_struct *mm) |
1da177e4c
|
19 |
{ |
8feae1311
|
20 |
struct vm_area_struct *vma; |
38f714795
|
21 |
struct vm_region *region; |
8feae1311
|
22 |
struct rb_node *p; |
38f714795
|
23 |
unsigned long bytes = 0, sbytes = 0, slack = 0, size; |
1da177e4c
|
24 25 |
down_read(&mm->mmap_sem); |
8feae1311
|
26 27 |
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { vma = rb_entry(p, struct vm_area_struct, vm_rb); |
1da177e4c
|
28 |
|
8feae1311
|
29 |
bytes += kobjsize(vma); |
38f714795
|
30 31 32 33 34 35 36 37 |
region = vma->vm_region; if (region) { size = kobjsize(region); size += region->vm_end - region->vm_start; } else { size = vma->vm_end - vma->vm_start; } |
1da177e4c
|
38 |
if (atomic_read(&mm->mm_count) > 1 || |
8feae1311
|
39 |
vma->vm_flags & VM_MAYSHARE) { |
38f714795
|
40 |
sbytes += size; |
1da177e4c
|
41 |
} else { |
38f714795
|
42 43 44 |
bytes += size; if (region) slack = region->vm_end - vma->vm_end; |
1da177e4c
|
45 46 47 48 49 50 51 52 |
} } if (atomic_read(&mm->mm_count) > 1) sbytes += kobjsize(mm); else bytes += kobjsize(mm); |
498052bba
|
53 |
if (current->fs && current->fs->users > 1) |
1da177e4c
|
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 |
sbytes += kobjsize(current->fs); else bytes += kobjsize(current->fs); if (current->files && atomic_read(¤t->files->count) > 1) sbytes += kobjsize(current->files); else bytes += kobjsize(current->files); if (current->sighand && atomic_read(¤t->sighand->count) > 1) sbytes += kobjsize(current->sighand); else bytes += kobjsize(current->sighand); bytes += kobjsize(current); /* includes kernel stack */ |
df5f8314c
|
69 |
seq_printf(m, |
1da177e4c
|
70 71 72 73 74 75 76 77 78 |
"Mem:\t%8lu bytes " "Slack:\t%8lu bytes " "Shared:\t%8lu bytes ", bytes, slack, sbytes); up_read(&mm->mmap_sem); |
1da177e4c
|
79 80 81 82 |
} unsigned long task_vsize(struct mm_struct *mm) { |
8feae1311
|
83 84 |
struct vm_area_struct *vma; struct rb_node *p; |
1da177e4c
|
85 86 87 |
unsigned long vsize = 0; down_read(&mm->mmap_sem); |
8feae1311
|
88 89 |
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { vma = rb_entry(p, struct vm_area_struct, vm_rb); |
38f714795
|
90 |
vsize += vma->vm_end - vma->vm_start; |
1da177e4c
|
91 92 93 94 |
} up_read(&mm->mmap_sem); return vsize; } |
a2ade7b6c
|
95 96 97 |
unsigned long task_statm(struct mm_struct *mm, unsigned long *shared, unsigned long *text, unsigned long *data, unsigned long *resident) |
1da177e4c
|
98 |
{ |
8feae1311
|
99 |
struct vm_area_struct *vma; |
38f714795
|
100 |
struct vm_region *region; |
8feae1311
|
101 |
struct rb_node *p; |
a2ade7b6c
|
102 |
unsigned long size = kobjsize(mm); |
1da177e4c
|
103 104 |
down_read(&mm->mmap_sem); |
8feae1311
|
105 106 107 |
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { vma = rb_entry(p, struct vm_area_struct, vm_rb); size += kobjsize(vma); |
38f714795
|
108 109 110 111 112 |
region = vma->vm_region; if (region) { size += kobjsize(region); size += region->vm_end - region->vm_start; } |
1da177e4c
|
113 |
} |
7e1e0ef22
|
114 115 116 117 |
*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> PAGE_SHIFT; *data = (PAGE_ALIGN(mm->start_stack) - (mm->start_data & PAGE_MASK)) >> PAGE_SHIFT; |
1da177e4c
|
118 |
up_read(&mm->mmap_sem); |
7e1e0ef22
|
119 120 |
size >>= PAGE_SHIFT; size += *text + *data; |
1da177e4c
|
121 122 123 |
*resident = size; return size; } |
65376df58
|
124 125 |
static int is_stack(struct proc_maps_private *priv, struct vm_area_struct *vma, int is_pid) |
58cb65487
|
126 |
{ |
65376df58
|
127 128 129 130 131 132 133 134 135 136 137 138 |
struct mm_struct *mm = vma->vm_mm; int stack = 0; if (is_pid) { stack = vma->vm_start <= mm->start_stack && vma->vm_end >= mm->start_stack; } else { struct inode *inode = priv->inode; struct task_struct *task; rcu_read_lock(); task = pid_task(proc_pid(inode), PIDTYPE_PID); |
58cb65487
|
139 |
if (task) |
65376df58
|
140 141 |
stack = vma_is_stack_for_task(vma, task); rcu_read_unlock(); |
58cb65487
|
142 |
} |
65376df58
|
143 |
return stack; |
58cb65487
|
144 |
} |
1da177e4c
|
145 |
/* |
8feae1311
|
146 147 |
* display a single VMA to a sequenced file */ |
b76437579
|
148 149 |
static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma, int is_pid) |
8feae1311
|
150 |
{ |
3c26c9d95
|
151 |
struct mm_struct *mm = vma->vm_mm; |
b76437579
|
152 |
struct proc_maps_private *priv = m->private; |
8feae1311
|
153 154 155 |
unsigned long ino = 0; struct file *file; dev_t dev = 0; |
652586df9
|
156 |
int flags; |
6260a4b05
|
157 |
unsigned long long pgoff = 0; |
8feae1311
|
158 159 160 161 162 |
flags = vma->vm_flags; file = vma->vm_file; if (file) { |
496ad9aa8
|
163 |
struct inode *inode = file_inode(vma->vm_file); |
8feae1311
|
164 165 |
dev = inode->i_sb->s_dev; ino = inode->i_ino; |
4c967291f
|
166 |
pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT; |
8feae1311
|
167 |
} |
652586df9
|
168 |
seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); |
8feae1311
|
169 |
seq_printf(m, |
652586df9
|
170 |
"%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", |
8feae1311
|
171 172 173 174 175 176 |
vma->vm_start, vma->vm_end, flags & VM_READ ? 'r' : '-', flags & VM_WRITE ? 'w' : '-', flags & VM_EXEC ? 'x' : '-', flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', |
6260a4b05
|
177 |
pgoff, |
652586df9
|
178 |
MAJOR(dev), MINOR(dev), ino); |
8feae1311
|
179 180 |
if (file) { |
652586df9
|
181 |
seq_pad(m, ' '); |
2726d5662
|
182 |
seq_file_path(m, file, ""); |
65376df58
|
183 184 185 |
} else if (mm && is_stack(priv, vma, is_pid)) { seq_pad(m, ' '); seq_printf(m, "[stack]"); |
8feae1311
|
186 187 188 189 190 191 192 193 |
} seq_putc(m, ' '); return 0; } /* |
dbf8685c8
|
194 |
* display mapping lines for a particular process's /proc/pid/maps |
1da177e4c
|
195 |
*/ |
b76437579
|
196 |
static int show_map(struct seq_file *m, void *_p, int is_pid) |
1da177e4c
|
197 |
{ |
8feae1311
|
198 |
struct rb_node *p = _p; |
5096add84
|
199 |
|
b76437579
|
200 201 202 203 204 205 206 207 208 209 210 211 |
return nommu_vma_show(m, rb_entry(p, struct vm_area_struct, vm_rb), is_pid); } static int show_pid_map(struct seq_file *m, void *_p) { return show_map(m, _p, 1); } static int show_tid_map(struct seq_file *m, void *_p) { return show_map(m, _p, 0); |
1da177e4c
|
212 |
} |
dbf8685c8
|
213 |
|
1da177e4c
|
214 215 |
static void *m_start(struct seq_file *m, loff_t *pos) { |
dbf8685c8
|
216 |
struct proc_maps_private *priv = m->private; |
dbf8685c8
|
217 |
struct mm_struct *mm; |
8feae1311
|
218 |
struct rb_node *p; |
dbf8685c8
|
219 220 221 |
loff_t n = *pos; /* pin the task and mm whilst we play with them */ |
2c03376d2
|
222 |
priv->task = get_proc_task(priv->inode); |
dbf8685c8
|
223 |
if (!priv->task) |
ec6fd8a43
|
224 |
return ERR_PTR(-ESRCH); |
dbf8685c8
|
225 |
|
27692cd56
|
226 |
mm = priv->mm; |
47fecca15
|
227 |
if (!mm || !atomic_inc_not_zero(&mm->mm_users)) |
27692cd56
|
228 |
return NULL; |
dbf8685c8
|
229 |
|
47fecca15
|
230 |
down_read(&mm->mmap_sem); |
dbf8685c8
|
231 |
/* start from the Nth VMA */ |
8feae1311
|
232 |
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) |
dbf8685c8
|
233 |
if (n-- == 0) |
8feae1311
|
234 |
return p; |
47fecca15
|
235 236 237 |
up_read(&mm->mmap_sem); mmput(mm); |
1da177e4c
|
238 239 |
return NULL; } |
dbf8685c8
|
240 241 |
static void m_stop(struct seq_file *m, void *_vml) |
1da177e4c
|
242 |
{ |
dbf8685c8
|
243 |
struct proc_maps_private *priv = m->private; |
47fecca15
|
244 245 246 247 |
if (!IS_ERR_OR_NULL(_vml)) { up_read(&priv->mm->mmap_sem); mmput(priv->mm); } |
dbf8685c8
|
248 |
if (priv->task) { |
dbf8685c8
|
249 |
put_task_struct(priv->task); |
47fecca15
|
250 |
priv->task = NULL; |
dbf8685c8
|
251 |
} |
1da177e4c
|
252 |
} |
dbf8685c8
|
253 |
|
8feae1311
|
254 |
static void *m_next(struct seq_file *m, void *_p, loff_t *pos) |
1da177e4c
|
255 |
{ |
8feae1311
|
256 |
struct rb_node *p = _p; |
dbf8685c8
|
257 258 |
(*pos)++; |
8feae1311
|
259 |
return p ? rb_next(p) : NULL; |
1da177e4c
|
260 |
} |
dbf8685c8
|
261 |
|
03a44825b
|
262 |
static const struct seq_operations proc_pid_maps_ops = { |
1da177e4c
|
263 264 265 |
.start = m_start, .next = m_next, .stop = m_stop, |
b76437579
|
266 267 268 269 270 271 272 273 |
.show = show_pid_map }; static const struct seq_operations proc_tid_maps_ops = { .start = m_start, .next = m_next, .stop = m_stop, .show = show_tid_map |
1da177e4c
|
274 |
}; |
662795deb
|
275 |
|
b76437579
|
276 277 |
static int maps_open(struct inode *inode, struct file *file, const struct seq_operations *ops) |
662795deb
|
278 |
{ |
dbf8685c8
|
279 |
struct proc_maps_private *priv; |
ce34fddb5
|
280 |
|
27692cd56
|
281 |
priv = __seq_open_private(file, ops, sizeof(*priv)); |
ce34fddb5
|
282 283 |
if (!priv) return -ENOMEM; |
2c03376d2
|
284 |
priv->inode = inode; |
27692cd56
|
285 286 287 288 289 290 291 |
priv->mm = proc_mem_open(inode, PTRACE_MODE_READ); if (IS_ERR(priv->mm)) { int err = PTR_ERR(priv->mm); seq_release_private(inode, file); return err; } |
ce34fddb5
|
292 |
return 0; |
662795deb
|
293 |
} |
27692cd56
|
294 295 296 297 298 299 300 301 302 303 304 |
static int map_release(struct inode *inode, struct file *file) { struct seq_file *seq = file->private_data; struct proc_maps_private *priv = seq->private; if (priv->mm) mmdrop(priv->mm); return seq_release_private(inode, file); } |
b76437579
|
305 306 307 308 309 310 311 312 313 314 315 316 317 318 |
static int pid_maps_open(struct inode *inode, struct file *file) { return maps_open(inode, file, &proc_pid_maps_ops); } static int tid_maps_open(struct inode *inode, struct file *file) { return maps_open(inode, file, &proc_tid_maps_ops); } const struct file_operations proc_pid_maps_operations = { .open = pid_maps_open, .read = seq_read, .llseek = seq_lseek, |
27692cd56
|
319 |
.release = map_release, |
b76437579
|
320 321 322 323 |
}; const struct file_operations proc_tid_maps_operations = { .open = tid_maps_open, |
662795deb
|
324 325 |
.read = seq_read, .llseek = seq_lseek, |
27692cd56
|
326 |
.release = map_release, |
662795deb
|
327 |
}; |